Method of forming clevises



Aprifl 1935. G. c. MILLER ET AL 1,997,871

METHOD OF FORMING CLEVISES Original Filed Dec. 3, 1930 2 Sheets-Sheet 1 INVENTORS.

BY ZQ A TTORNEYS.

Aprrfifl 716, 193. G, c. MlLLER ET AL.

METHOD OF FORMING CLEVISES Original Filed Dec. 3, 1930 2 Sheets-Sheet 2 NVENTORS.

BY /72 %M/ ATTORNEYS.

Patented Apr. 16, 1935 George C. Miller.

Application and William; Brenner, I EriaPa. "I December 3,1930,v Serial No. 499,711 I Renewed August 4, 19,34 I

iz' oia (01. 29-148) Commonly clevises are formedby casting,- drop forging, or stamping, with included strengthening parts inthe head. i The present invention involves a departure from the prior methods in that we roll a bar containing arlongitudinalrib corresponding to the head of the clevis,'-fiaring sides corresponding to the sides of .the clevis, and edge ribs whichmaybe utilized for. forming the bearing surfaces at the ends ofzthe sides. With such a blank, or bar, we form the ends of theclevis and periorateit and thensever the bar. at intervalscorresponding to the width of the clevis. We then straighten the sides with'a rolling action, the rollers breaking the edges formed by the'perforation... In this way we get a practically. finished clevis with the exception of the hole through the headLand form. the clevis of the most desired'proportions and vatja cost considerably below. 'clevis'es having the same characteristics. Features and details oithe invention will appear fromthe. specification-and claims. .1 The finished clevis and the apparatus for forming it are illustrated in the 'accompanying drawings as follows:-

2 i Fig. .1 shows a front elevation of a pairof forming rolls. 9 f Fig. 2 a perspective view of the finished bar. Fig. 3 a front elevation of the punch-and'coining pressa v :7 i

Fig; 4 a plan view' of the bottom die" of the press. c Fig. 5 a bottom view oi it'he punchand coining dies. T Fig. 6 a plan view o'f-the bar partially formed. Fig. 7 an end view of the formed bar; 1 Fig. 8 an end view showing the) manner of severing the bar to form the clevisunits. Y

Fig. 9 a plan view of one of-theunits. Fig. 10' a sectional'view on the line [0-40 in Fig. 11 showing the=rolls for straightening the sides of the clevis unit.

Fig. 11 a section on the line Il-ll in Fig. 10. Fig. 12 a plan view of the finished clevis. Ordinary rolls l and 2 are provided, these rolls having a finishing pass 3, the rolls forming a bar 4, as shown in Fig. 2. The bar 4 has a longitudinal rib 5 corresponding in shape to the clevishead, the sides 6 corresponding to the sides of the clevis, thesesides flaring relatively to each other and edge ribs 1, the faces of these ribs being preferably in the same plane.

The press has a bottom die 8. This is provided with a central guide 9 receiving the rib 5 and sides 6 and is provided with a punch die opening ill' and w an' initial coining socketdix Spaced from these are thercoining dies l2 and again. spaced from these arethe sheared edges '13.

. The plunger of the press has a punch l4 operating with the opening iii- The next plunger 5 i5 is provided with a coiningsocket opposing the socket l2 and the plunger lfihaving ashear face 16a operatingin' relation to the'shear l3. The

bar progresses through the press, one step at a time," and with the first operation of the'punch, as shown in Fig. 3, depresses the rib at I7, leaving'la slight raise i8 and punching the opening i9. With the next step under the plunger [5 a coined bearing projection 29 is completed. "With the next step the edge is trimmed along the edge 2| 'ot the-projection 29. At the completion of this operation'in the'press the bar has a form as shown in Fig. '7. r I

The ba'r is then severed by any preferable instrument, as; for instanc'a a saw 22; as shown in Fig. 8. g This provides the clevis units with a head 23, the flanged sides 24, the coined bearing projections 2i and perforations 19, as shown in Fig. 9. The-next step is to flatten the sides and thus complete the'form for the turnbuckle' This 25 is. accomplished with the apparatus shown in Figs. 10 and 11. "A plunger'25'carries theiorme ing"head --'-25ct.' Straightening rolls26-'-26 are arranged oppo'sitely'to each other, the passbe tween these rollsbeing just equal to'the cross dimension of the head'2 3. These rolls are fixed on shafts 5 21 and' these' shafts are journaled in' side 'plat'es28. Therollsare'provided with beveled flanges 29 which are adapted to engage the severede'd'ges ofthe sides andbreak the corners. The rolls a' e-provide'd with sockets 33 adapted to receive the bearing'projections 2 I The shafts 2'1 are-provided with gears 3! which mesh with gears 32. The gears 32-are carried on shafts 33 journaled in the side plates '28 and meshwith racks '35, these racks being 'securedby studs 36 with the plunger 25, the studs providing a means of adjustment of the racks and consequently of i the rolls. The head 25a has the forming end 31 which fits between the sides and against the head 23 of the unit. The unit is placed in thepass, theplunger descends and as it reaches the unit starts the unit into the pass. The rolls travel with the same surface speed as the plunger and consequently the head carries the unit through the pass, the rollers exerting sufiicient pressure not only to straighten the sides but to break down the corner of the sides. The bearing projections of the sides enter the sockets 38 on the plunger head and the opposite bearing projections enter metal yielding to permit the projections to pass.

out of the depressions 38.

With this the clevis is finished with the exception of forming an opening in the head. The finished clevis is shown in Fig. 12 and is provided with the head 23, the straightened sides' 46 and the sides having the bearing projections 2| and being provided with perforations.

What we claim as new is:-

1. The method of forming clevises which consists in forming a bar with a longitudinal unitary clevis head-forming rib and clevis side plates extending from said rib in the general direction which the sides take in the finished clevis at a point of juncture with the head, and separating the bar into clevis units.

2. The method of forming clevises which con sists in forming a bar with a longitudinal unitary clevis head-forming rib and side plates projecting from the rib and extending laterally therefrom, bending the side plates into approximately parallel relation, and severing the bar into clevis units.

3. The method of forming clevises which consists in forming a bar with a longitudinal unitary clevis head-forming rib and side plates projecting from the rib and extending laterally therefrom, bending the side plates into approximately parallel relation, and severing the bar into clevis units, the severing of the bar preceding the bending of the side plates.

4. The method of forming clevises which consists in forming a bar with a longitudinal headforming rib and side plates extending from the rib with the outer edges of the side plates in approximately the same plane, fashioning the edges of the side plates for clevis ends, bending the side plates into approximately parallel relation', and severing the bar into clevis units.

, 5. The method of forming clevises which consists in forming a bar with alongitudinal head: forming rib and side plates extending from the rib withthe outer edges of the side plates in approximately the same plane, fashioning the edges of the side plates for clevis ends, severing the bar into clevis units and bending the side plates into approximately parallel relation.

6. The method of forming clevises which consists in forming a bar with'a. longitudinal unitary clevis head-forming rib and clevis-side plates extending from said rib in the general direction which the sides take in the finished clevis at the point of junction with the head, said side plates extending in flaring relation to each other laterally from the head, bending the plates into approximately parallel relation, and severing the bar into clevis units.

7. The method of forming clevises which consists in forming a bar with a longitudinal unitary clevis head-forming rib and clevis side plates extending from said rib in the general direction which the sides take in the finished clevis at the point of junction with the head, said side plates extending infiaring relation to each other laterally from the head, bending the plates into approximately parallel relation, and severing the bar into clevis units, the bending of the plates preceding the severing of the bar.

8. The method of forming clevises which consists in forming a bar with a longitudinal unitary clevis head-forming rib and clevis side plates extending from said rib in the general direction which the sides take in the finished clevis at the point of junction with the head, said side plates extending in flaring relation to each other laterally from the head, fashioning the edges of the side plates for clevis ends, bending the side plates into approximately parallel relation, and severing the bar into clevis units.

9; The method of forming clevises which consists in forming a bar with a longitudinal unitary clevis head-forming ribwith side plates projecting from the bar and extending laterally therefrom and with clevis end-forming ribs along the edges of said plates, bending the plates into approximately parallel. relation, and severing the bar into clevis units.

10. The method of forming clevises which consists in forming a bar with a longitudinal unitary clevis head-forming rib with side plates projecting from the bar and extending laterally therefromand with clevis end-forming ribs along the edges of said plates, fashioning the edges of the side: plates for .clevis ends, bending the plates into approximately parallel relation, and severing the bar into clevis units.

- 11. The method of forming'clevises which consists in forminga bar with a longitudinal unitary clevis head-forming rib with side plates projectingfromthe head and extending laterally therefrom, severing the bar into units, and bending the side walls of the, units into parallel relation by rolling.

12. ;The methodof forming clevises which consists in forming a bar with a longitudinal unitary clevis head-forming rib with side plates projecting from the head and extending laterally therefrom, severing the bar into units, bending the sides of the Lmits into parallel relation, and breaking down the corners of said sides by rolling.

, GEORGE C. MILLER.

'WILLIAM J. BRENNER. 

